Portion of a shoe outsole



FIG. 1 is a plan view of a portion of a shoe outsole showing my new design;

FIG. 2 is a lateral front perspective view thereof;

FIG. 3 is a lateral rear perspective view thereof; and,

FIG. 4 is a medial rear perspective view thereof.

The broken lines showing a shoe and wedge shapes within the circular shapes throughout the views are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of a shoe outsole, as shown and described. 